package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;
    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Transactional
    public void insertSetmeal(SetmealDTO setmealDTO) {

        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //新增套餐
        setmealMapper.insertSetmel(setmeal);
        //获取新增套餐生成的主键值
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //新增套餐与菜品关系
        setmealDishMapper.insertSetmealDish(setmealDishes);
    }

    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    @Transactional
    public void deleteQuery(List setmealIds) {
        List<Setmeal> setmeals = setmealMapper.getBySetmeal(setmealIds);
        setmeals.forEach(setmeal ->{
            if(setmeal.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        setmealMapper.deleteQuery(setmealIds);
    }

    @Override
    public SetmealVO getById(Long id) {
        SetmealVO setmealVO = new SetmealVO();
        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealDishList = setmealMapper.getByIdSetmealDish(id);
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishList);
        return setmealVO;
    }

    @Transactional
    public void update(SetmealDTO dto) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(dto,setmeal);
        setmealMapper.updateSetmeal(setmeal);
        setmealDishMapper.deleteSetmealDish(dto.getId());
        List<SetmealDish> setmealDishes = dto.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(dto.getId());
        });
        setmealDishMapper.insertSetmealDish(setmealDishes);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        if (status == StatusConstant.ENABLE){
            List<Integer> byStatuses = dishMapper.getByStatuses(id);
            byStatuses.forEach(byStatus -> {
                if (byStatus == StatusConstant.DISABLE) {
                    throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            });
        }
        Setmeal setmeal = new Setmeal();
        setmeal.setId(id);
        setmeal.setStatus(status);
        setmealMapper.updateSetmeal(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

}
